CUMMINS 326-5336 ONAMAX 15W40 OIL 1 QUART
 
OnaMax™ 15W-40 is factory tested to offer maximum protection. The OnaMax™ engine oil is specially formulated to reduce consumption and engine wear due to high temperature oil oxidation and viscosity increase. All Onan Generators from the factory are shipped with OnaMax™ 15W-40.
32oz bottle size.
 
NOTE: Multi-grade oils such as SAE 15W-40 are recommended for year-round use in Cummins liquid-cooled engines, or as a good all-season oil for air-cooled engines. SAE-30 is the preferred summer grade for optimum oil consumption control in Cummins air-cooled engines.